How to put a password on the application in Xiaomi Redmi Note 9 Pro: all ways 2026

Xiaomi Redmi Note 9 Pro is one of the most popular smartphones in the Xiaomi lineup, but even its owners do not always know how to reliably protect personal data in apps. Have you ever given a phone to a friend to show a photo but worried that it will accidentally open your messenger or banking application? Or want to limit children’s access to certain programs? In this article, we will examine all the current ways to password applications on the Redmi Note 9 Pro – from built-in MIUI functions to third-party solutions with advanced settings.

It's important to understand that password protection is not just about privacy, it's about security. For example, if you're storing screenshots of bank card data or correspondence with important information on your phone, an extra layer of protection can save you from fraud. We've tested all methods on Redmi Note 9 Pro with the latest versions of MIUI 14 and Android 12, so the instructions are up to date for 2026. If you have a different version of firmware, check for features in the settings, as Xiaomi sometimes moves or removes individual options.

1. Built-in "Application Lock" function in MIUI

The easiest and most obvious way to do this is to use the default default application lock feature in MIUI firmware, which doesn't require you to install additional programs and is stable, but it has limitations: you can't set different passwords for different applications, for example, or use a fingerprint for some programs.

To activate the lock:

1. Open Settings → Applications → Blocking applications.
2. If the function is disabled, click Enable and confirm the action with a password from the Mi Account or a pattern lock.
3. Select the apps you want to password by moving the slider to the right.
4. Configure additional options: for example, you can enable the option to Hide notifications so that the content of the blocked applications does not appear on the lock screen.

⚠️ Note: If you forget your Mi Account password, you can’t unblock it without resetting your phone to factory settings. Also note that some system applications (such as Settings or Phone) can’t be blocked.

Make sure your Mi Account is linked to your phone|Remember the password from the Mi Account|Update MIUI last-minute|Check if the app supports blocking (some games and services may ignore it)-->

2.Use of the "Second Space" to isolate applications

The MIUI's Second Space feature allows you to create a separate work profile with your own apps, settings, and data, which is useful if you want to completely isolate some programs -- like work messengers from personal ones -- and when you switch between spaces, the system will ask for a password or a fingerprint.

How to set up:

• 🔒 Go to Settings. → Second space.
• 📱 Click Create a second space and follow the instructions (you will need to come up with a new password or PIN-code).
• 🔄 Once created, you can switch between swipe spaces down the lock screen or through the notification bar.
• 📦 Install the apps in the second space via Google Play or Mi App Store.

💡 A useful tip: The second space can be used not only to protect, but also to test new applications without risking the main profile. For example, if you want to try out the beta version of the messenger, but are afraid of failures, install it in the second space.

Password to lock screen |Fingerprint |Blocking individual applications |Second space in MIUI |Do not protect-->

Third-party applications for blocking: TOP-3 solutions

If MIUI's built-in features aren't enough, you can use third-party software, which offers more features, like different passwords for different apps, locking on a schedule, or even taking photos of someone trying to break the security, and we tested three of the most reliable apps that are compatible with the Redmi Note 9 Pro:

⚠️ Note: When using third-party blockers, turn off battery optimization for them in the settings MIUI, Otherwise, the protection may be reset after the phone sleeps. → Annexes → Application management → [blocker] → Battery → No restrictions.

4.Shide applications without password: an alternative approach

If you don't want to lock apps, but you just want to hide them from the public, MIUI has a Hidden Apps feature, which doesn't password-protect programs, but makes them invisible in menus and search, and to find one, you need to know the exact name or use a special gesture.

How to hide the application:

1. Press the app icon on the home screen.
2. In the menu that appears, select Hide the application (if there is no option, drag the icon up to the Hide inscription).
3. Confirm the action. The app will disappear from the menu.

To return the hidden app:

• 🔍 Make a swipe down gesture with two fingers on the home screen.
• 🔐 Enter the password from the lock screen.
• 📱 Find the hidden app in the list and click on it to return to the screen.

💡 Useful tip: Hidden applications can still be found through system search (Device Search in Swipe Down).To avoid this, disable indexing for specific programs in search settings.

5 Protection through Child Mode

If your goal is to restrict your child's access to certain apps, instead of blocking, you can use Child Mode, which allows you to create a whitelist of allowed programs, and all the others will be automatically blocked, and when you try to open a banned application, the system will ask for a password.

How to set up:

• 👶 Install the Google Family Link app from the Play Market (it is free and official).
• 🔧 Create a child profile and link it to the child’s account (if not, register a new one).
• 📋 In the profile settings, select which apps will be available and which will be blocked.
• ⏱ Set time limits for use.

⚠️ Attention: Family Link Child Mode only works for Google accounts, if a child uses a local profile without Gmail binding, this method will not work.

💡

Child Mode via Family Link is the only way to limit not only how apps are launched, but also how long they are used, and it is useful for monitoring children, but not for protecting personal data from adults.

6. Advanced protection: encrypting application data

For maximum security, you can encrypt specific applications, which doesn't block them from running, but makes the content inaccessible without a password. For example, in Redmi Note 9 Pro, you can encrypt:

• 📁 Folders with application files (for example, databases of messengers).
• 🔐 Password Storage (if you use Google Smart Lock or Bitwarden).
• 📱 Backups of applications in Mi Cloud.

How to encrypt data:

1. For files: Use Files → Personal Storage (embedded in MIUI encrypted storage) and transfer application files (e.g. WhatsApp backups from /sdcard/WhatsApp/Databases).
2. For passwords: Enable encryption in the password manager settings (for example, in Bitwarden this is done in Settings → Security → Master Password).

💡 Useful tip: If you encrypt messenger backups, remember to update them regularly. Otherwise, when you restore, you will get outdated data.

7. Frequent mistakes and how to avoid them

When setting up app locks, users often encounter typical problems, and here are the most common errors and ways to solve them:

⚠️ Attention: If you are using ADB To remove the blocker, be careful - the wrong commands can lead to a system failure. it is better to entrust this to specialists or use proven instructions (for example, adb uninstall com.domobile.applock for AppLock).

FAQ: Answers to popular questions